HIGH7.5
PYSEC-2026-1443
H2O Vulnerable to Denial of Service (DoS) via `/3/ImportFiles` Endpoint
Details
A vulnerability in the `/3/ImportFiles` endpoint of h2oai/h2o-3 version 3.46.1 allows an attacker to cause a denial of service. The endpoint takes a single GET parameter, `path`, which can be recursively set to reference itself. This leads the server to repeatedly call its own endpoint, eventually filling up the request queue and leaving the server unable to handle other requests.
Are you affected?
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Affected packages
PyPI/h2o
Introduced in:
0No fixed version published yet for h2o (pip). Pin to a known-safe version or switch to an alternative.
References
- https://nvd.nist.gov/vuln/detail/CVE-2024-7768[ADVISORY]
- https://github.com/h2oai/h2o-3[PACKAGE]
- https://github.com/h2oai/h2o-3/blob/7d418fa19d3ab434f742818e37f891bef9102c97/h2o-core/src/main/java/water/api/ImportFilesHandler.java#L19[WEB]
- https://huntr.com/bounties/3fe640df-bef4-4072-8890-0d12bc2818f6[WEB]
- https://pypi.org/project/h2o[PACKAGE]
- https://github.com/advisories/GHSA-p2vc-m5fv-9w9m[ADVISORY]